The Son of Neptune is a great book it is done by Rick Riodan. For those who do not know who he is. He does the Percy Jackson series. Also the CANE CRONICALS and HEROS of OLYMPUS. I like these books a lot. The characters are Percy, Frank, and Hazel. Rick Riodan is a great author. He has web site. You can explore Camp Half-blood. ([LINK]). Also you can find out facts about the Greek and roman gods and goddesses.